US1744362A - Milling machine - Google Patents

Description

Jan. 2l, 1930. L. A. CARTER l 1,744,362

r MILLING MACHINEY Y Filed March 21, 1928 v sheets-sheet 1 Mli C12- Jan; 2l, 1930. y" A.CARTR I1,744,332

MILLING MACHINE v Filed March 21. 1928 'K Sheets-Sheet 2 Jan. 2l, 1930. L.. A. CARTER MILLING MACHINE v Filed March 21. 1928 '7 Sheets-Sheet Jan. 2l, 1930.

CARTER` 1,744,362

MILLING MACHINE Fileduaroh 21. 1928 v sheets-sheet 4 Jah. 2l, 1930., l L. A. CARTER MILLING MACHINE 7 Sheets-Sheet 5 Fil'ed March 21, 1928 f (HWI-HH" .un W" Il /A/ VA/ roe.

Jan. 2l, 1930. L. A. CARTER v 1344352 MILLING MACHINE Filed"Maroh 21, 1928 7 Sheets-Sheet 6 1 Jan. 21, 1930. l.. A. ARTER 1,744,362

MILLING MACHINE .f/Aj @Trop/wens Patented Jan. 21, 193i) LONEL A. CARTER, GF WEBSTER GRDVES,

COIVEANY, OF ST. LS, A

-l-ISSO'JRI, AEISGNE TO LEHMANIT MACHEN@ .MILL-ENG MACHEN?.

This invene'ion relates to milling machines l riiieulnily ada-pied foi' use in cutting; oil

ibuing grooves in journal bearings oi i'iul It has for its pi'iiieipel ob- Ney axles.

jeeis to produce e milling ins-shine which will qiiliolily, easily and eeeuniely out Circuler, longitudizml, right and le'fohend helical oil gzjifooves in the eonozwe journal engaging sui-- ieee oi che journal bearing. @ther objects ere io provide Ineens for ooi'ooly posiioi ing the bearing on the table o' die machine, ineens for seoing lie nioenine to en longi- *e'udinel ggrooii'es of diii'ei` u lengths and heiioai p'ioovos i different angles, und ineane ibi' con oliing the oui-ling oi seid grooves by menne e eiiggle operating Another obje/: i JLiovide ineens ioi pieventin@v ed the euwtei' when the outei not iuuniue', and 'to obein othe; adveneges here 2g insite): eppeei'ine.

lever.

The inz'enion eonsiets in the neullinz..- Ine- .e and in the eonsixuetion, combinations the zioeon'ipenying' drawings, which i ai Y speeiiieeiiion and wherein lil-e sjfiiibols ie io iike gants wlieievei' they occur,

Fie. l is 'ii'ont elemiion oil s milling bine euibodyingv on; iuvencion,

. .2 is :in end elevueion thereof,

i 1.o, C33 e 35i-on oi ''lie machine ibo drive gezuiingI s e'ion,

.1 a horizontal cross-section on the .i Fig. 8,

5 is :1 vei'iesl crosfs-seoion thi'ough meel'xine on the line in Fig. 2,

Y igi. 6 e vertical Central longitudinal szeeioi through the machine on the line 6@ il elle geel boxes Containing 'heieioi' being shown in n l n e is e pien View oi die feed cont-rolling geen box and the cani lever et the top hereoi' which eonti'ois lche starting, stopping and the dii'eetion oi boh vertical and Circuler feeds, so Fign 9 is e horizontal sectional View of the ien* of the lower pl'irziou;

een: which con of 'he l, machin-e, and

front elevation of the storting i on which eoniol p and piovided along` iis upg-ei' side with longitudinal s" dev-rays l, upon i is suppoied a eai'i'iege i3. The ee:-

iiog'o is holo down on the sideways l2 01"' oei by ineens of pistes 14e thei- :iie bolted oi' oihei'wise removably secured to the boe` tom i ee oi 'the ezuiiage eeen side edge iiheieoi with 'heii' inner side edges efibendingr bene*L l the overhanging ouiei sioe edges of ehe i eweys. he om.' ,e 13 is slid longitudine y of the bed by ineens of hoizonisl shuifil in e beer ng pro- 5, which ifs jouiusled i leieioi et one end oi? the bed and is end with e bend Wheel iis inner end Wiih e iheaded pow which enf; ges :i cliieeded bore in e l bieeliei 18 nized to the aojeeen; end oi seid of the mein column 2 Ovide nuts 2lb, which serve es adjustable stops eed sein 6 whose outei end is positioned ie iop oi `the cui-tei head Column. fixed e i p of the ouitei head 2l is su upsei Qlaj whose uoper end passes loosei i s hole 26a in che outer end of the The screw 2la l above and belenT the openingv 526a ior limiting the niovenient the cutter head tudinal siidable carriage 13 for rotation on a vertical airis, an annular wor supporting table 27 having a worin gear 8 "lor fd in its peripheral edge. As shown in the drawings, the carriage 13 is provided with a circular upstanding flange i2!) which surrounds the worm gear of the table and forms a lubricant chamber for supplying oil to said worm gear. The annular work supporti ng table srrrounds the cutter head column 19 and is held down on the carriage 13 by means ot a retaining ring 3() which is secured to the lower edge olif said table and projects beneath the outer edge ot an annular plate 31 screwed to the carriage.

The brass or journal 32, in which it is desired to cut the oil distributing grooves, is placed in an upright position on the table 27, with its concave journal engaging portion facing the cutting end ot' the end mill 22, and rigidly secured in the desired position on the table by means of a pair ot brackets 33. Each of these brackets comprises a horizontal base portion, which rests on the upper surface of the table, and an upstanding portion provided with a vertical slot 34 adapted to accommodate a horizontally disposed clamping bar 35, which extends across the upper end of the journal bearing and has a depending hook portion adapted to hook over the upper inner corner of the bearing. The outer end of the clamping bar is threaded to receive a nut 3G, which prevents inward sliding movement of the bar. The upper surface of the table 27 is provided with a series ot radially extending T-slots 37 adapted to slidably support bottom clamping bars 38 of T-shaped section having an upstanding hook .1t its inner end adapted to engage the inner lower corner of' the bearing'. As shown in the drawings, each of the brackets 3?) is arranged with its base portion over one of the radial T-slots 37 and is secured to the clamping bar 38 therein by cap screws 39, which also serve to clamp said clamjiing bar in said slot and thus prevent movcn'ient of the supportingr bracket on the table. The bearing is forced against the hooked inner ends otl the top and bottom clampingr bars anfl 3Q. respectively, by u eans ol set screws 40 that are tliraded through the upstanding portion of the supporting bracket and bear against the outer surface oi said bearing.

The mechanism for rotating the table 2T and the end mill 2Q, and for actuating the vertically slidable cutter head 2l comprises an electric motor 4l attached to the rear side of the bed of the machine near one end thereof, and three groups ot' gears contained in gear housings A, B and C, respectively` bolted to said bed. The gear box A is bolted to the ond of the bed adjacent to the motor 4l and contains Yl'our horizontally disposed parallel shafts 42, 43, 44 and 45, respectively, which extend longitudinally ot the bed from side wall to side wall of the gear bo): A with their ends rotatably supported. in bearings tl'ierein. As shown in the drawings, the main drive sha'lt 42 is driven from the motor 4l by means oi a sprocket chain 4G, and has two gears 47 and 48 tin-ed thereto which mesh with a. pair of gears 49 and 50 join ialed on the shai't 43 and a pair ot gears 5l and 52 j ournaled on the sl aft rhe two gears on each of the shafts 42, and 44 are oi different dianieter, the large gear 47 on the main shaft 42 meshing with the small gears 49 and on the counter shafts 43 and 44, and the small gear 4S on said main shaft 42 meshing with the large gears 50 and on said counter shafts. Splined on the counter shafts 43 and 44, between the pairs o gears journaled thereon; are clutches 53 and 54, respectively, that are provided at their opposite ends with clutch teeth adapted to be engaged with clutch teeth on. the opposing tacos of said pair of gears, where one Vor the other gears ol each pair may be coupled to its counter .shaft to drive the same at either of two speeds.

The clutch member 53 on the counter shaft 43 is slid longitudinally of the shaft to engage one or the other of the lgears 4. and thereon by means of a clutch shifter arm iXed to a horizontal rock-shaltv 56, which is located below said counter shaft and extends transversely thereof from end to end or' the gear box A with its ends rotatably supported in the end walls thereof. The front end oi" the rock-shaft projects beyond the ront te ce of the gear box A and is provided with an operating lever 57. rlihe clutch member which en the two l`gears 5l an d on the counter shaft 44 shifted longitudina thereof into engagement with one er the otl r of said gears by means of a shifter arm :"8 fixed to a horizontal rocl -sliatt 5f) located aoove said counter shaft and extending ti versely thereof from end to end of the gear box A with its ends rotatably supported in the end walls ot said gear box'. The rockshaft 59 is also provided at its outer end with an operating .lever G() located between the lower lever 57 and said end oi said gear box. Fixed to the 'trout face of the gear bor: A is a bracket (il having a horizontally disposed forwardly projecting plate portion (l2 which extends beneath the lower end of the upper lever G0 and has a vertically slidable plunger pin 63 mounted in a recess thereon. The pin is forced upwardly by means of a spring 64 sleeved therein between the head thereof and the shoulder 'formed by the rounded lower end of the pin; the head of the pin beingadapted to scat in either of two recesses 65 in the lower end of the upper lever 5T when the llO lil)

levell is shifted to engage the clutch l With ithei` of the gears 51 and on the counter shaft 1141 and the rounded lower end of said pin being,r forced downwardly into the recess in the lovver lever in the neutral position thereof. Ey this arrangement, the lower lever 57, which controls the sliding movement of the cutter head 21 and the rotation of the table 27, is locked in neutral position when the upper lever 60, which controls the rotation of the cutter 22, is in neutral position, thereby rendering it impossible to rotate the table or move the cutter head before the cutter has started to rotate.

The clutch 54C on the counter shaft le has a gear G7 formed integral therewith vi'hich meshes with a gear 68 fixed to the shaft 4:5. rthe inner end of the shaft Ll5 projects through the inner side of the `rear boX A and is slidably connected with one end of another shaft 69 disposed in axial alinement thereivith by means of a Coupling sleeve 70. The other end of tbe cutter' drive shaft section G9 is keyed to the hub of a bevel gear 71, which is rotatably supported in bearings in a housing' 72 bolted to the lower end portion of the cutter head column 19 and meshes With a bevel gear 78 having a hub portion journaled in bearings provided therefor, in said housing.

The hub oortion of the bevel gear 7 3 is splined on a vertically disposed shaft 74,`

which extends upwardly through the central openings in the carriage 13 and the table 27 and has the hub of a bevel gear 75 lined to the upper end thereof. The hub por ion ofthe bevel gear 75 is journaled in beai in the verticallyslidable cutter head 21; and said bevel gear meshes with a bevel gear 76 having,y a hub portion journaled in bearings in said cut-ter head for rotation on a horizontal aris. The hub of the bevel gear 76 is pro vided with a tapered bore adapted to receive the tapered shank portion of the mill 22, which is held in the hub of said gear by means of a screw 77.

The inner end of the counter shaft- 13 terminates beyond the inner Wall of the gear box A and has a gear 78 keyed thereon which meshes with a gear 7 9 lreyed to the adjacent end of a split connecting shaft 79, which extends longitudinally of the bed 11 and is supported in bearings 80 bolted to the front face thereof. The tivo sections of the shaft 70 are connected by means of a suitable multiple disk friction clutch 81, which serves as a safety device by slipping;` when the stop nuts 211 strike the arm 2G of the main column and thus prevent further slidingr movement of the cutter head 21. Keyed to the conneet infr shaft 79a is a gear 82, which meshes With a gear 83 fixed to one end of a horizontally disposed drive shaft 84 journaled in the gear box B bolted to the front Wall. of the bed of the machine. Two separate drives are taken from the drive shaft 84 in the gear box B,

one for the vertical feed of the cutter head 21, and the other for the circular feed of the Worlr table ffl'. rEhe cutter head feed is taken off the drive shaft at right angles thereto through three bevel gears, 85, 80 and 87, respectively. rlhe bevel gears 85 and S6 are rotatably mounted on the drive shaft 811 and have clutch teeth formed in the opposing faces; and the third bevel gear 87 is in continuous mesh with the tivo and 0S and is journaled for rotation on a hori ontal axis in the rear Wall of the gear boi; B. he bevel gear 87 is keyed on the end of a short shaft 88 Whose opposite end has a gear fixed thereon which meshes `with a gear 90 lined to a horizontal Worm shaft 01 iournaled in a suitable housing* 92 secured to the lower end of the cutter head column 10.

ined to the Worm shaft is a Worin 93, which meshes With a Worm gear 94 formed on a nut 95 journaled for rotation on the vertical axis of the housing 92 and held againClt movement therein by means of sui thrust bearings. The nut 95 hav the Worin gear 9athereon cooperates with a vertically disposed screw Whose upper end is secured to the vertically slidable cutter head 21 by means of a pin 97 which prevents rotation of said screvv. Splined on the drive shaft 84 between the two bevel gears 85 and 8G is a clutch 98 which is provided its opposite ends with clutch teeth adapted to oooperate With clutch teeth formed in opposite faces of said bevel gears 85 and 86. The clutch 98 is slid into engagement with one or the other of the tivo bevel gears 85 and 86 to obtain forward or reverse feed for the cutter head by means of a roel; arm 09 lined to a vertically disposed roch shaft 100, rotatably supported in beari ks provided therefor in the top and bottom vfells of the gear box B. Journaled in the front wall of the gear box B is a short horizontal shaft S0 provided at its inner end with a small bevel gear 85h, Which meshes with the bevel gear 86, and is provided at its outer end ..vith a squared portion 80C adapted to receive a socket tool or handle whereby7 the cutter head may be reciproeated independently of the drive gearing therefor.

The table drive taken olf drive slrl Slof the gear boi; B through three beit.. gears 101, 102 and 103, respectively. The bevel gears 101 and 10E?J are loose on the d shaft 84 and have clutch teeth formed in. tici; opposing faces; ano the third bevel tfre/ar 103 is an idler gear Which is provided in the rear Wall of the gear box and meshes continuously With the two gears 101 and 1.02i A clutch member 104 is also splined on the drive shaft 84 and is provided at its ends with clutch teeth adapted to cooperate with clutch teeth formed on the opposing end faces of the two bevel gears 101 and 102 to secure a forward or reverse rotation of the gear 102. The

lfii

clutch 104 is slid into engagement with either of the two bevel gears 101 and 102, by means of a rock arm 105 secured to a vertical rock sha-ft 100 whose upper and lower ends are journaled in the top and bottom walls of the gear box B. The bevel gear 102 is Secured to one end of a short shaft 107, which extends li eyond the end of the gear box B and is provided with a gear 108 which meshes with a gear 109 on the end of a horizontally disposed drive shaft 110 located thereabove.

The drive shaft 110 extends through the gear box B and through a change speed gear box C bolted to the front face of the bed of the machine. This change speed gearing which is shown and described in detail in my Patent No. 1,290,101, dated March 1, 1919, comprises a rocker .arm 111 fdidablyand pivota-iyoiounted on the drive shaft 110 between the end walls of the change speed gea box C and has a yoke portion which embraces two trains of gears 112 and 113, either one of which may be caused to engage with any one of a series of ten gears 114 keyed on a shaft 115, which is located above the shaft 110 and is disposed parallel to said shaft with its ends rotatably supported in the ends of the change speed gear box. The gears 114 are of different size, adjacent gears varying in size by one or two teeth from each other, the series of gears forming a stepped cone. shifting the rocker arm 111 along the shaft 110 and swinging the handle thereof, the gear trains 112 and 113 may be engaged with any one of the cone gears 114. The handle of the rocker arm 111 may be secured in any said position to hold the gear trains in proper mesh by means of a spring pressed pin 116, t-he end of which is adapted to engage in one of a series of holes 117 in the quick change gear box C. The holes 117 are arranged in two rows, one above the other, marked 1 to 10 an d 11 to 20, respectively, corresponding to the twenty changes which may be obtained in the speed of tbe shaft by driving one or t-he other of the ten gears through one or the other of the two trains of gears carried by the rocker arm.

Extending parallel to the axis of the cone gears 1111- is a shaft 118, which is slidably and rotatably mounted in the quick change gear box C. The shaft 118 has two gears 119 and of different diameters keyed thereon; and one end of the sha ft projects bej,f'ond the quick change gear box and is provided with a knob 121, whereby the shaft may be slid in the direction of its length to bring the large gear 119 thereon into mesh with the smallest cone gear, or to bring the small gear 120 on said shaft into mesh with the largest cone gear. By this arrangement the twenty changes obtained in the speed of the shaft 115 by the cone gears and rocker arm is increased to forty changes in the speed of the shaft 118.

The longitudinally slidable shaft 118 extends through a sleeve 122 which is rotatably supported in the quick change gear box C and is connected to the said shaft for rotation therewith by means of a spline 123. This rotary sleeve 122 is held against endwise movement in the quick change gear box C and has a gear 124: fixed to its outer end which meshes with a gear 125 fixed to a sleeve 126 journaled for rotation on an axis parallel to the axis of the longitudinally slidable shaft 118 within an upstanding bearing provided therefor at the end of the quick change gear box. One end of a worm shaft 127 projects through the sleeve 126 and is splined thereto, and the other end is journaled in the carriage 13, whereby said shaft is driven by said sleeve and, at the same time, is longitudinally slidable therein when the carriage is slid along the bed 11. The carriage end of the worm shaft 127 is journaled in bearings provided therefor in the opposite walls of a housing 128 mounted on and movable with the carriage 13 and is provided with a worm 129 which meshes with a worm gear 130 fixed to a horizontal shaft 131 journaled on the carriage and extending crosswise thereof. The worm gear shaft 131 is also provided with a worm 132 which meshes with the worm gear 28 on the periphery of the work supporting table 27 and thus serves to drive the same. The outer end of the shaft 131 projects beyond the housing 128 and is squared, as at 131, to receive a socket wrench or handle, whereby the table can be rotated independently of the drive gearing therefor.

The two clutches 98 and 1011 in the gear box B are connected together so that the starting and stopping and also the direction of movement of the cutter head 21 and the table 27 are controlled by the manipulation of a single control lever 133 located on top of said box in easy reach of the operator. This control lever 133 has an enlarged hub portion 134e which is pivotally secured to the top of the control box by a vertical pivot 1.35. The underside of the hub portion 1311 of the control lever 133 is provided on its bottom face with two downwardly opening cam grooves 13G and 137 located one on each side of the control lever pivot Mounted in a horizontal slideway 138 provided therefor on top of the gear box B are two slide blocks 139 and 140, respectively, the block 139 having an upstanding pin 14-1 ihereon which cooperates with the cam groove 130, and the block 140 having an upstanding pin 142 which cooperates with the other cam groove 137. Fixed to the upper end of the rock shaft 100` which actuates the clutch 98 for the cutter head feed, is an operating handle 143; and journaled on said shaft 100 above the handle 143 is a block 145 having a slot-and-pin connection 146 with the slide block 1.39 that cooperates with the cam groove 136 in the control lever 133. The rotary to t Cir,

block 145 carries two spring plungers 147 which bear against the opposite sides of the handle 143. The upper end ot the rock shaft 106, which actuates the clutch 104L for the table feed, is also provided with an operating handle 143, a rotary hloelr 143, having a slot-and- 2in connection 150 with the slide hloelr 140 that cooperates with the cam groove 137 in the control lever 133, and two spring plunger-s 151 hearing against the oiposite sides ol the handle lV ith this arrangement, swinging movement of the control lever 133 causes the rotary hloclrs 14:5 and 150 to rotate on the rock sha1- ts 100 and 106, respectively, and swing the operating handles 143-14l3 thereon through the medium of the spring plungers and thus throw in or out the cutter head feed and table drive. It is n oted, that the spring connection between 'the rotary hloclrs and the handles fixed to the clutch operating s rafts permits said handles to he operated independently ot the main control handle 133; and they also permit the clutches controlled thereby to yield slightly until the teeth thereof are properly meshed with the clutch teeth on the A desirable arrangement ot the oil distributing grooves for journal hearings comprises two parallel grooves 1:12 extending parallel to the axis of the hearing and connected hy two intersecting right and left hand helical grooves 153 connecting one end of each straight groove with the opposite end of the other straight groove; and the cam grooves 136 and 137 in the hub of the control lever 133 have heen designed to enable the present machine to cut the ahove grooves with but tour movements of the eo trol lever 133.

The operation of the machine 'fo-L The join-nal bea is placed on 1 lilo 27 in up t position with its d journal en surface ifacin the cutting ed;R o't the vertically moveable end mill 22 and is then clamped in proper position on the table hy means ot brackets llhe upper and lower stop nuts 2G21 ou the upright screw 21 carried hy the cutter head 2l are then adjusted to limit the vertical slidmovement or the cu ter head to a distance corresponding to the length desired ior the two parallel grooves 151 that are to he cut in the journal heari e' 'the table then manually rotated hy means oit the worm shalt 131 to bring the worl in proper position with reference to the end cutter; and the cutter head is then adjusted hy means ol the shaft 3G to bring the cutter t a proper elevation. The operador then sets the quielr change gear hoX C hy means ol" the rock arm 111 and axially moveable shaft 118 to ohtaiu a table speed which will cause the table to rotate a distance corresponding to the distance hetween the two straight grooves 151 while the end mill moves vertically a distance eorrespending to the length ol' the straight grooves. The lever on the gear box A is then shifted to throw in one or the other ot' the two rotary speeds for the end mill, after which the lever 57 on said gear boi; is shift A'l to one or the other of its ions to drive the gearing in les stated above, the mount- -f'l oit the levers 57 and G0 on the gear hex is s un t` at the lever 57 which supplies the tee-d tor the bei; l5 cannot he thrown in until after the lever GO is operated to throw in the rotary cutter drive. It is also note-:il that with the lever 57 in either of its two feed positions no movement is imparted to the table 27 or cutter head 21 until the control lever 133 is operated to throw in the clutches 93 and 1G11 inthe control box B. Alfter the levers 57 and 60 or" the starting bei; A have heen operated to throw in the rotary cutter drive and the leed for the control hoi; B, and the gears in the quick change gear loo); C have been adjusted to obtain the desired table speed, the carriage 13, which supports the rotary table 27, is shifted longitudinally oi the hed 11 hy means oit the hand wheel 16 to move the jou 1nal hearin 39; into engagement with the cutting end of the rotating end mill. litter correctly positioning the journal hearing on the table and setting the machine to eut straight grooves of the desired length and helical grooves oit the desired length and angle, the two straight grooves and the two intersecting helical grooves are cut in the journal hearing hy but 'four movements of the control lever 133. lVith the cams 13G aid 137 shaped shown in the drawings, when the control lever 133 is moved to a eentral position, it causes the end mill 22 to move upwardly with the cutter head 21 and thus eut one ol? the vertical grooves. Villien the control lever is moved to the lett it cau es tl` end cutter to move downwardly and 1e table to rotatIV o the left, thus causing the end mill to cut the lett hand helical groove. When the control lever is again moved to the center it cau er the end mill to again move upwardly and no mrweinent is ingiparted to the table, thereby causing the second vorti al groove to he cut. Wh en the control lever is shilted to the lett it causes the end mill to iin move downwardly and, at the same time, also causes the table to rotate to the t, thereoy causing a hand helical eve to loe cut iu the ournal hearing, The stops 21D, whieh were set hei'ore the operation for the length of slot desired, abut against the overhead arm 2G ot the main column 25 during the upward and downward sliding movement ot the cutter head. thereby ireventing further sliding movel ment of the cutter head and relieving the operator ot the necessity for operating the control lever .atprecisely the right time to throw out the clutches in the control hoX B,

The change speed gearing, When properly set according to the length ot straight groove desired, will give the table a speed which will properly connect the adjacent ends of the helical and straight grooves. The cams in the hub of the control lever 133 are designed to provide neutral positions between all leed positions oi" said lever.

Obviously. the machine hereinbefore described admits of considerable modification without departing from the invention, as simple gear changes may be made to adapt the machine to cut other forms of grooves, and the machine will readily lend itself to any inirticular requirements.

What I claim is:

l. A milling machine comprising a slidable and rotatably supported work table, a cutter head slidable in directions parallel to the rotary axis of said table, a rotary end cutter journaled in said cutter head, means for rotating said table and said cutter in all positions of their sliding movement, and means for reciprocating said critter head independently of or simultaneously with the rotation ot said work table.

2. A milling machine comprising a bed, a carriage on said bed, a work table rotatably supported on said carriage, means for rotating said table in either direction in all positions of the sliding movement of said carriage, a cutter head slidable in directions parallel to the rotary axis of said table, a rotary end cutter journaled in said cutter head, means for rotating said cutter and said table in all positions ot the sliding movement of said cutter head, means for reciprocating said cutter head independently of or simultaneously with the rotation of said work table, and adjustable means i'or limiting thi` sliding movement of said cutter head in both directions of its sliding movement.

El. A milling machine comprising a bed, a carriage on said bed, a Work table rotatably supported on said carriage, means for rotating said table in all positions ot' the sliding movement ol said carriage, a cutter head slidable in directions parallel to the rotary axis o i" said table, a rotary end cutter liournaled in said cutter head, means for rotating said cutter in all positions of the slidingl movement of said cutter head, means for .securing independent or simultaneous operation ot said cutter l1 ad and said table in either direction ot' their movement, and adjustable means for limiting the sliding movement of said cutter head andthe rotary movement of said table.

4. A milling machine comprising a bed, a carriage on said bed, a Work table rotatably supported on said carriage, means for rotating said table at different selected speeds in all positions of the sliding movemeut ot said carriage, a cutter head slidable in direc ions parallel to the rotary axis of said table, a rotary end cutter journa ed in said cutter head, means for actuating said cutter head and for rotating said cutter and said table in all positions ot the sliding movement or' said cutter head and said carriage, and a single control ireans for independently or simultaneously operating said cutter head and said table operating means.

5. A milling machine comprising a bed, a carriage en said bed, a table rotatably supported on said carriage, means for rotating said table in all positions of the sliding inovement ot said carriage, a cutter head slidable. in directions parallel to the rotary axis oli said table, a rotary end cutter lioiirnaled in said cutter head, means for rotating' said cutter in all positions el the slidingl `inc-vement of said cutter head, and a single control means for said cutter and said table operating' means, said control means being' arranged to secure independent or simultaneous operation of said cutter head and saidI rotary table.

G. A milling machine comprising' a bed, a carriage on said bed, a table rotatably supported on said carriage, means lio iotatimr said table in all positions of the sliding movement ot said carriage, a cutter head slidable in directions parallel to the rotary axis of said table, a rotary end cutter joiii'naled in said cutter head, means for rotating said cutter in all positions ot' the sliding movien'icnt ofsaid cutter head, a single control means lor said cutter and said table operating means.` said control means being arranged to reciprocate said cutter head independently of or simultaneously With the rotation of 'said rotary table, and means for varying the sneed @if the initie. t

7. A milling machine comprising a bed, a carriage on said hed, a table rotatably supported on said carriage, a cutter head slidable in directions parallel. to the rotary axis oi said table, a rotary end cutter ioijirualed in said cutter head, gearing for .actuating said cutter head and to; relating said cuttcr and said table in all positihns ot the sliding movement of said cutter head and saidcarriage, clutches o icrating ivitli s id gearing for changing` the direction et rotation of said table and the .slidingmovement ol2 said cutter, and a single control lever operatively connected with "said clutches vtor independently or simultaneously operating said table and .said cutter head in either direction of their movement.

8. A. milling machine comprising a bed, a carriage on said bed, a table rotatably supported on said carriage, a cutter head slidable in a direction parallel to the rotary axis of said table, a rotary end cutter ioiirnaled in said cutter head, clutch controlled gearnig lor actuating said cutter head and lor rotating said cutter` and said table in all positions ot the sliding movement of said cutter head and said carriage, and means cooperating With said clutch tor op t' the same to rotate the critter and feed the cutter head, said clutch operating` means areventing the cutter head 'feed from beii g thrown in betere the cutter is rotated.

9. A milling machine comprising a bed, a carriage on said bed, a table rotatably supported on said carriage, a cutter head slidable in directions parallel to the rotary el said table, a rotary end cutter journaled in said cutter head, means for operating; said table, said cutter and said cutter head at either of tivo speeds, and means for preventing operation of the table and cutter head until the cutter is operated.

10. A milling; machine comprising; a bed, a carriage on said bed, a table rotatably supported on said carriage, a cutter head slidable in directions parallel to the rot 'y axis of said table, a rotary end cutter journaled in said cutter head, clutch controlled gearing i'or operating said table, said cutter head and said cutter at either of two speeds, clutch operating' levers for actuating the clutch of said gearing, and means cooperating with said levers for locking` in neutral position the lever which controls the table drive and cutter head feed When the lever which controls the cutter drive is in neutral position.

l1. A milling machine comprising a bed, a carriage on said bed, a table rotatably supported on said carriage, a cutter head slidable in directions parallel to the rotary axis of said table, a rotary end cutter journaled in said cutter head, clutch controlled gearing' for operating said table, said cutter head and said cutter at either of two speeds, clutch operating levers Jfor actua-ting1 the clutch ol said gearing, and means cooperating;` with said levers for locking in neutral position the lever which controls the table drive and cutter head leed when the lever Which controls the cutter drive is in neutral position, said locking means being releasable by the movement to operative position of the lever which controls the cutter' drive.

l2. A milling` machine comprising a bed, a carriage on said bed, a table rotatably supported on said carriage, a cutter head slidablc in either direction parallel to the rotary axis oig said table, a cutter rotatable in said head, clutch controlled gearing for rotatingn said table in either direction ot its rotary movement and for moving, said cutter head in either direction of the sliding' movement, said gearing including; a clutch for controlling the movement of the table in either direction and a clutch for controlling the movement of the cutter head in either direction, and a single control means cooperating' with each oi' said clutches, whereby said clutches may be independently or simultaneously actuated by the control lever.

13. A milling machine comprising a bed, a

carriage on said bed, a table rotatably supported on said carriage, a cutter head slidable in either direction parallel to the rotary axis of said table, cutter rotatable in said head, clutch controlled gearing 'tor rotating sait table in either direction. oil' ,Y moveA ment and for moving;` said cutter head in ei 'her direction o'l the sliding; movement, said geen ing including a clutch for controL ng the movement et the table in either direction and clutch tor controlling' the movement ot the cutter head in either direction, and a single control lever having` a cam cooperating' with each o said cloches, whereby said clutches may be independently or sinuiltaneously actuali-ed by the control lever.

lil- A millii machine comprising; a bed, a carriage on sa d bed, table rotatably supported o i a nage, a cutter head slidable in either direction parallel to the rotary ani of said table, a cutter rotatable in said head, clutch controlled gearing` tor rot'fdging1 said table in either direction oit its rota y movement and for moving said cult r heeeL in either direction of the sliding; movement, d gearing; including a clutch for controlling the movement et the table in either direction and a clutch for controlling` the movement o' the cutter head in either direction, a single control lever having a cam cooperating with each oi said clutches, whereby said clutches may be independently or simultaneously actuated by the control lever, and separate levers for actoating` said clutches independently ci said control. lever.

l". A milling' machine compri-Laing` a bed, a carriage on said hed a table rotatably snpum el.

portedon said carriage, a cnt-ter head sliflable in either direction parallel to the rotary airis oi said table, a rotary cutter ionrnaled in said cutter head, clutch controlled gearing; 'for rototing said cutter, Ylor rot l table in either direction oi its rotA t, for moving` said cutter head in eit tion of the sliding` movement, said geari including a Y clutch lier controlling the move nient of the table in either direction and a clutch for controlline` the movement el' cntter head in either direction, a reel Ashalt for each clutch, a shifter arm on said rock-shalt and cooperatingI with said clutch, a block roM tatably mounted on each rocloshatt, an arm lined to each rock-shalt adjac nt to the block thereon, yieldable connections between said rotary blocks and said arms, a pair of slide blocks arranged for sliding movement transversely or' said rock-s laits, and having slotand-pin connections Witl said rotary blocks thereon, a control lever jonrnaled on a pivot located between said blocks for swinging movement transversely et said shafts, and having cam grooves therein, and pins on said blocks cooperating with said cam grooves.

16 A milling machine comprising' a bed, a carriage on said bed, a table rotatably supporte-1l on sa `either direction et its rotary movement and for moviT g said cutter head in either direction o'j the diding movement, said gearing including a couch for controlling the movement ot (he table in either direction and a clutch Vfor conlrolling the movement of cutter head in either direction, a rock-shaft Yfor each clutch, a @hitter arm on said rock-shaft and cooperating with said clutch, a block rotatably mounted on each rock-shaft, an arm lixed to each rock-shaft adjacent to the block thereon, yieldable connections between said rotary blocks and said arms, a pair of slide blocks arranged for sliding movement transversely of said rock-shafts, and having slotand-pin connections with said rotary blocks thereon, a control lever journaled on a pivot located between said blocks for swinging movement transversely of said shafts, and having cam grooves therein, and pins on said blocks cooperating with said cam grooves, said cam grooves being shaped to secure independent or simultaneous operation of the clutches in the ditl'erent angular positions of the control lever.

17. A milling machine comprising a bed, a carriage on said hed, a table rotatably supported on said carriage, a cutter head slidable in either direction parallel to the rotary axis of said table, a rotary cutter journaled in said head, clutch controlled gearing for rotating said cutter, for rotating said table in either direction of its rotary movement and for moving said cutter head in either direction ofthe sliding movement, said gearing including a clutch for controlling the movement of the table in either direction and a clutch for controlling the movement of the cutter head in either direction, a single control means cooperating with each of said clutches, whereby said table and said cutter head may be independently or sirrmltaneously actuated by the control lever, said gearing including a change speed mechanism for obtaining different table speeds.

18. A machine for cutting oil grooves in journal bearings, comprising a bed, a carriage on said bed, a` table rotatably supported on said carriage, and adapted to support the journal bearing, means for rotating said table in all positions of the sliding movement of said carriage. a cutter head slidable in directions parallel to the rotary axes of said table and said bearing, a rotary end cutter journaled in said cutter' head, means 'for rotating said cutter in all positions of the sliding movement of said cutter head, a single control means for said cutter head and said table operating means, said control means being arranged to secure independent operation of said cutter hea-d and the table to cut straight and circular grooves, respectively, and to s cure simultaneous operation of said cutter head and said table to cut helical grooves.

19. A machine for cutting oil grooves in journal bearings, comprising ay bed, a carriage on said bed, a table rotatably supported on said carriage, and adapted to support the ljournal bearing, means for rotating said table in all positions of the sliding movement of said carriage, a cutter head slidable in directions parallel to the rotary axes of said table and said bearing, a rotary end cutter journaled in said cutter head, means 'for rotating said cutter in all positions of the sliding movement of said cutter head, a single control means for said cutter head and said table operating means, said control means being arranged to secure independent operation et said cutter head and the table to cut straight and circular grooves, respectively, and to secure simultaneous operation of said cutter head and said table to eut helical grooves, and means for changing the speed of the table to eut helical grooves of different angles.

Signed at St. Louis, Missouri, this 19th day ot March, 1928.

LIONEL A. CARTER.

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